I've heard that deleting certain jump files can cause this sort of behavior but more likely you'll just screw up your client. The more effective route would be to intercept packets so you can have players teleport instead of jumping.
And no, no programs like that are public atm. It's simple to do once you have a working hook/proxy based bot up and running without detection though.
There is an aimbot in the bots/macros part of the forum by InfamousNoone that's called "Reconfigureable Aimbot," it was for private servers but it had a feature that stopped the jump animation but no one who I PMed answered back (I didn't pm InfamousNoone cause I thought he was just too busy making great things. :P). I want the jumps to teleport the people instantly like his bot does aka disabling the jump animation.
